Intake
My RZR came with an original proto BTI (From Dragonfire). I have 100 miles on the RZR since I bought it, (now it has 175miles) and the filter was spotless, just a little dust at the bottom of the can. The throttle body was spotless too, so I think all is good! I am in the process of either buying the trany new mount or making one myself, I will change the mount just incase, and monitor whats happening at the connection to the TB.
It is a nice unit, but if it were my money, I think I would try the plastic (donaldson) type that is being sold on ebay for around $250.
Have fun all!!!!